6 THE MARINE ALGAE OF PERU 
species of Peruvian algae are mentioned, of which four are proposed 
as new. 
The United States Exploring Expedition under the command 
of Lieutenant (afterwards Admiral) Charles Wilkes visited Peru 
in June and July 1839 and about 820 species of plants are said to 
have been collected there by members of the party. In the 
Columbia College Herbarium there are Peruvian specimens of 
Ulva Lactuca rigida, U. fasciata costata, Macrocystis pyrifera 
Humboldtii, and Gigartina Chauvinii, with Wilkes Expedition 
labels, though no Peruvian material is mentioned in Bailey and 
Harvey’s account* of the algae of this expedition. 
In various phycological works of F. T. Kiitzing, published 
from 1843 to 1869, a considerable number of Peruvian algae were 
described as well as others from Chile that have a direct bearing 
upon the marine flora of Peru. And the same is to be said also 
of the numerous important phycological works of J. G. Agardh, 
ranging as to date from 1841 to 1901. These and other works in 
which we have found original references to Peruvian algae will be 
cited in the following pages. 
. The paper in which more of the marine algae of Peru are men- 
tioned than in any other up to the present time (with the exception 
of De-Toni's "Sylloge Algarum ") is Antonio Piccone's account of 
the algae of the voyage of the Vettor Pisani,f published іп 1886. 
In this and the supplementary papert published three years later, 
thirty-two species (excluding diatoms) are attributed to Peru. 
In De-Toni's "Sylloge Algarum,"$ if one includes several 
"species inquirendae" and some others that are reducible to 
synonymy and if опе аї the same time excludes several that have 
been reported only from outside the present political boundaries 
of the republic, about sixty-five species of marine algae may be 
found ascribed to Peru. Since the publication of the various vol- 
* Wilkes Exped. 17: 155-192. 1862. For notes on this report, see F. S. Collins, 
“Тһе botanical and other papers of the Wilkes Exploring Expedition" (Rhodora 14: 
57-68. 1912). 
T Alghe del viaggio di circumnavigaaione della Vettor Pisani. 8vo. 1-97. pl. 
I, 2. Genova, 1886. 
1 Nuova alghe del viaggio di circumnavigazione della “ Vettor Pisani.” Мет. В, 
Accad. Lincei IVa. 6: — (1-57). 1889 
$ Vols. т, 3-5. 1880-1007. 
un eed 
Piper іі 
